The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 15KY418 # Created Fri Jan 24 02:10:52 2025 # Orbit generated from Bernstein formalism # Fitting 19 observations of 19 # Arc: 55.93d # First observation: 2015/05/17 # Last observation: 2015/07/12 Preliminary a, adot, b, bdot, g, gdot: -0.000004 0.047761 -0.000014 0.006224 0.033018 0.000000 # Chi-squared of fit: 7.20 DOF: 32 RMS: 0.11 # Min/Max residuals: -0.25 0.25 # Exact a, adot, b, bdot, g, gdot: 2.105086E-05 4.172992E-02 2.089774E-06 4.686972E-03 3.207941E-02 5.907454E-03 # Covariance matrix: 3.5269E-13 2.4498E-11 -2.7730E-14 5.9608E-12 7.4352E-12 3.5056E-10 2.4498E-11 4.2387E-08 -8.9230E-11 1.0744E-08 6.9021E-09 -8.8455E-07 -2.7730E-14 -8.9230E-11 3.0546E-13 -2.3746E-11 -1.4157E-11 1.9669E-09 5.9608E-12 1.0744E-08 -2.3746E-11 2.7568E-09 1.7432E-09 -2.2644E-07 7.4352E-12 6.9021E-09 -1.4157E-11 1.7432E-09 1.1728E-09 -1.3116E-07 3.5056E-10 -8.8455E-07 1.9669E-09 -2.2644E-07 -1.3116E-07 2.1980E-05 # lat0 lon0 xBary yBary zBary JD0 13.947199 -140.941680 -0.296456 0.232683 -0.936530 2457159.907658 # Heliocentric elements and errors Epoch: 2457150.5000 = 2015/05/08 Mean Anomaly: 9.88781 +/- 5.895 Argument of Peri: 37.28878 +/- 18.345 Long of Asc Node: 154.93723 +/- 0.081 Inclination: 14.90967 +/- 0.010 Eccentricity: 0.44526644 +/- 0.0627 Semi-Major Axis: 55.78473323 +/- 3.4650 Time of Perihelion: 2452970.5681 +/- 2461.5 Perihelion: 30.94566345 +/- 3.9899 Aphelion: 80.62380301 +/- 6.1077 Period (y) 416.6595 +/- 38.82 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -24.05750040 +/- 0.0251 Ecliptic Y -19.90182140 +/- 0.0203 Ecliptic Z 7.51358629 +/- 0.0080 Ecliptic XDOT 0.00193621 +/- 0.0003 Ecliptic YDOT -0.00301920 +/- 0.0002 Ecliptic ZDOT 0.00050982 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 32.11385681 +/- 0.0227 Geocenter to KBO 31.17264128 +/- 0.0333 # Hcoef: 8.16
The following table shows the complete astrometric record for 15KY418. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (15KY418) followed by the observatory code and reference code for the source of the astrometry.
2015 05 17.40688 14 44 19.12 -01 16 02.1 24.5g 15KY418 T09 C~8SVz 2015 05 17.46303 14 44 18.81 -01 16 01.0 23.9g 15KY418 T09 C~8SVz 2015 05 17.49695 14 44 18.63 -01 16 00.3 24.1g 15KY418 T09 C~8SVz 2015 05 21.37537 14 43 57.69 -01 14 42.0 23.0i 15KY418 T09 C~8SVz 2015 05 21.38488 14 43 57.64 -01 14 41.9 23.1i 15KY418 T09 C~8SVz 2015 05 21.40102 14 43 57.55 -01 14 41.5 23.0i 15KY418 T09 C~8SVz 2015 05 21.40372 14 43 57.55 -01 14 41.5 23.1i 15KY418 T09 C~8SVz 2015 05 21.40910 14 43 57.50 -01 14 41.4 23.0i 15KY418 T09 C~8SVz 2015 05 21.41449 14 43 57.48 -01 14 41.0 23.1i 15KY418 T09 C~8SVz 2015 05 21.41718 14 43 57.46 -01 14 41.2 23.1i 15KY418 T09 C~8SVz 2015 05 26.28279 14 43 32.01 -01 13 16.7 22.7y 15KY418 T09 C~8SVz 2015 05 26.29897 14 43 31.93 -01 13 16.2 22.7y 15KY418 T09 C~8SVz 2015 05 26.31363 14 43 31.84 -01 13 16.2 22.7y 15KY418 T09 C~8SVz 2015 05 26.34311 14 43 31.70 -01 13 15.6 22.9y 15KY418 T09 C~8SVz 2015 05 26.34604 14 43 31.67 -01 13 15.6 22.8y 15KY418 T09 C~8SVz 2015 05 26.35783 14 43 31.61 -01 13 15.2 22.5y 15KY418 T09 C~8SVz 2015 07 12.31035 14 40 51.09 -01 13 45.4 23.0z 15KY418 T09 C~8SVz 2015 07 12.32653 14 40 51.08 -01 13 46.0 23.0z 15KY418 T09 C~8SVz 2015 07 12.33192 14 40 51.08 -01 13 45.6 23.0z 15KY418 T09 C~8SVz
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.10 0.00 0.05
2 0.0002 -4.76 -0.03 -0.39 -0.04
3 0.0002 -7.54 0.10 -0.56 -0.02
4 0.0109 -330.40 -0.01 -23.11 -0.02
5 0.0109 -331.14 0.04 -23.25 -0.09
6 0.0109 -332.55 -0.02 -23.29 -0.01
7 0.0109 -332.55 0.21 -23.29 0.01
8 0.0110 -333.29 -0.09 -23.42 -0.08
9 0.0110 -333.70 -0.04 -23.13 0.24
10 0.0110 -333.92 -0.04 -23.42 -0.02
11 0.0243 -723.02 0.07 -60.99 -0.12
12 0.0243 -724.32 0.06 -60.88 0.13
13 0.0244 -725.60 -0.05 -61.30 -0.15
14 0.0245 -727.78 0.11 -61.38 0.04
15 0.0245 -728.21 -0.09 -61.52 -0.07
16 0.0245 -729.19 -0.13 -61.42 0.14
17 0.1531 -3009.41 -0.16 -834.39 0.00
18 0.1531 -3009.37 0.10 -835.01 -0.25
19 0.1531 -3009.49 0.05 -834.63 0.25
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
15KY418 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0